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Image processing apparatus and method

a technology of image processing and chroma difference, applied in the field of image processing apparatus and method, can solve the problem that traditional image processing apparatus cannot correct off-set that arises from chroma difference, and achieve the effect of preventing off-s

Active Publication Date: 2012-04-24
KONICA MINOLTA BUSINESS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides an image processing apparatus and method that can prevent off-set based on information about brightness, hue, and chroma without compromising image data obtained from reading target surfaces. The apparatus includes a comparing and detecting section for comparing two image data obtained by simultaneously reading both sides of a document and detecting pixels with off-set based on the comparison result. The detected pixels can then be corrected based on information including brightness and hue. This technology allows for efficient and effective prevention of off-set in image processing."

Problems solved by technology

Therefore, the traditional image processing apparatus can not correct off-set that arises from chroma difference.

Method used

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  • Image processing apparatus and method
  • Image processing apparatus and method

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Embodiment Construction

[0022]In the following, an image processing apparatus according to an embodiment of the present invention will be described with reference to the attached drawings.

[0023]FIG. 1 shows a functional block diagram of an image processing apparatus 100 according to an embodiment of the present invention.

[0024]The image processing apparatus 100 includes an automatic document feeding section 10, a first image reading section 21 and a second image reading section 22, a first page memory 31 and a second page memory 32, a first color calculating section 41 and a second color calculating section 42, a comparing and detecting section 50, off-set correcting section 60, a controller 70, and a storage section 80.

[0025]The automatic document feeding section 10 includes a document tray, a pair of introduction rollers, a pair of feeding rollers, a platen glass, a pair of discharging rollers, and a discharge tray (none of them are shown).

[0026]The automatic document feeding section 10 feeds a document ...

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Abstract

Disclosed is an image processing apparatus, including: a comparing and detecting section for comparing two image data, which respectively obtained by nearly simultaneously reading both sides of a document, on a pixel to pixel basis and detecting a pixel, on which off-set arises, from the two image data based on a comparison result obtained by comparing the two image data; and a correcting section for correcting at least any one of brightness, hue and chroma based on information including brightness and hue of the detected pixel.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an image processing apparatus and method.[0003]2. Description of the Related Art[0004]In recent years, a simultaneous reading system capable of reading images from both sides of a document nearly simultaneously and executing image processing to the read image data is in widespread use. According to the system, reading speed can be improved compared with a traditional system that reads one side of a document at a time. Moreover, the simultaneous reading system can prevent the document from damages arise from an inverting motion, because the system needs no inverting motion.[0005]Here, “off-set” is pointed out as a problem of the simultaneous reading system. Off-set means that an image of one side of a document appears into the other side thereof when forming an image from image data obtained by reading both sides of the document.[0006]The off-set arises for the reason that, when reading s...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04N1/40H04N1/409
CPCH04N1/4095
Inventor OHKAWA, MIEKO
Owner KONICA MINOLTA BUSINESS TECH INC
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